package com.example.demo.config;

import com.fasterxml.jackson.databind.SerializationFeature;
import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateTimeSerializer;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.autoconfigure.jackson.Jackson2ObjectMapperBuilderCustomizer;
import org.springframework.boot.jackson.JsonComponent;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.util.TimeZone;

/**
 * @author wumin
 * @version 1.0
 * @Description: 全局时间格式化，部分字段不想用全局格式化可在字段加：@JsonFormat 注解进行格式化
 * @date 2021/4/8 9:16
 */

@Configuration
@JsonComponent
public class DateFormatConfig {


    private String pattern="yyyy-MM-dd HH:mm:ss";


    /**
     * @return Jackson2ObjectMapperBuilderCustomizer
     * @Description Date 类型全局时间格式化
     * @Author wumin
     * @Date 2021/4/8 9:16
     */
    @Bean
    public Jackson2ObjectMapperBuilderCustomizer jackson2ObjectMapperBuilder() {

        return builder -> {
            TimeZone tz = TimeZone.getTimeZone("Asia/Shanghai");
            DateFormat df = new SimpleDateFormat(pattern);
            df.setTimeZone(tz);
            builder.failOnEmptyBeans(false)
                    .failOnUnknownProperties(false)
                    .featuresToDisable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS)
                    .dateFormat(df);
        };
    }

    /**
     * @return com.fasterxml.jackson.datatype.jsr310.ser.LocalDateTimeSerializer
     * @Description LocalDate 类型全局时间格式化
     * @Author wumin
     * @Date 2021/4/8 9:16
     */
    @Bean
    public LocalDateTimeSerializer localDateTimeSerializer() {
        return new LocalDateTimeSerializer(DateTimeFormatter.ofPattern(pattern));
    }

    @Bean
    public Jackson2ObjectMapperBuilderCustomizer jackson2ObjectMapperBuilderCustomizer() {
        return builder -> builder.serializerByType(LocalDateTime.class, localDateTimeSerializer());
    }
}
